Checks the possibility of sending an email to the specified address. Sometimes it is necessary to check the address specified by the user to avoid unnecessary loads and block the sending of messages to invalid addresses.
Performance depends on the IP address of the system on which you run the email check. It is better to use the server that you use to send your email messages.
This version required dig for get address of MX server
- Sample with invalid email
crystal run email_checker.cr -- -e [email protected]
Checking address: <[email protected]>
MX is: gmail-smtp-in.l.google.com.
Start checking.
220 mx.google.com ESMTP o12si36431842ljc.263 - gsmtp
HELO example.com
250 mx.google.com at your service
MAIL FROM: <[email protected]>
250 2.1.0 OK o12si36431842ljc.263 - gsmtp
RCPT TO: <[email protected]>
550-5.1.1 The email account that you tried to reach does not exist. Please try
Email <[email protected]> is invalid.
Done.
- Sample with valid email
crystal run email_checker.cr -- -e [email protected]
Checking address: <[email protected]>
MX is: aspmx.l.google.com.
Start checking.
220 mx.google.com ESMTP m15si28862652lfc.164 - gsmtp
HELO example.com
250 mx.google.com at your service
MAIL FROM: <[email protected]>
250 2.1.0 OK m15si28862652lfc.164 - gsmtp
RCPT TO: <[email protected]>
250 2.1.5 OK m15si28862652lfc.164 - gsmtp
Email <[email protected]> is valid.
Done.
Todo:
- Write get mx from DNS directly
- Make multiple emails checking from file
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